Personally I drink 2-3 espressos every other day or so and find it easy to maintain that level. In fact, I wish I were more addicted to caffeine, because I recently realized that I can write better with it, hands down. I would sometimes go for a week or two without drinking much caffeine because I thought it was unnecessary and slightly hurt my stomach, but now I regret neglecting it.
Personally I drink 2-3 espressos every other day or so and find it easy to maintain that level. In fact, I wish I were more addicted to caffeine, because I recently realized that I can write better with it, hands down. I would sometimes go for a week or two without drinking much caffeine because I thought it was unnecessary and slightly hurt my stomach, but now I regret neglecting it.